Apparatus for heating or cooling material



Jam; 6 2925 A. HUH N APPARATUS FOR HEATING OR COOLING MA'I'ERIA'L 2 Sheet Original Filed Dec. 12

ATTORNEYS.

APPARATUS FOR HEATING OR COOLING MATERIAL Original Filed Dec. 12, 1919 2 Shee'bs Sheet A 7" TOR/v5: Ya

Patented Jan. ti, 1925..

rates ALEX G. HUHN, OE MINNEAPOLIS, ITENNESOTA, ASSLEGNOB TO A. HUI-IN MANUFAC- TUBING. COMPANY, OF TJEINNEAPOLIS,

MINNESOTA, A CORPORATION.

APPARATUS HEATING- OR COOLING MATERIAL. 7

Application filed December 12, 1919, Serial No. 344,408. Renewed June 9, 1924.

To all whom it may concern:

Be it known that I, ALEX G. HUHN, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and substantially longitudinal tubes which I employ and thereby being subjected to an excessive influence of the heating, warming, coolin or freezingagent used within the tubes. Another object is to provide an economical use of the space occupied by the tubes.

The full objects and advantages of my invention will appear in connection with the detailed description thereof and the novel features embodied in my inventive idea will be particularly pointed out in the claims.

In the accompanying drawings which illust-rate the application of my invention,

Fig. 1 is a central longitudinal section of my apparatus, showing the use of a plurality of tubes square in cross section and having one corner uppermost. Fig. 2 is a cross section of a tube triangular in shape. Fig. 3 is a cross section of a tube which is diamond shaped. Fig. 4 is a front elevational view of the apparatus. Fig. 5 is a view in cross section on the line 5-5 of Fig. 1. Fig. 6 is a sectional detail considerably enlarged.

As illustrated, a battery of parallel tubes 10 are all supported at one end and passed through a head 12 and are supported at the other end in a casting 14 by some of the tubes, as indicated at 16. Within the tubes 10 and spaced from the walls thereof are tubes 17 which pass through the head 12 into a supply box 18 to which a heating or cooling agent is supplied by a pipe 20. The outer tubes 10 which are closed at their rear ends have their front ends leading into a discharge box 22 from which the heating or cooling agent is withdrawn through a pipe 24. Attached to the head 12 is an annular rim 26 from the bottom of which a discharge pipe 28 extends'and from the top of which extends a pipe 30 which may be connected to a suction device, orfan, in the usual manner, for rawing air through or from the cylinder. Enveloping the battery of tubes 10, is a cylinder 32 which is rotatably supported upon rollers 34. The cylinder is rotated by means of an annular gear 36 secured thereto, which is driven by a spur gear, not shown, from a pulley 38.- The interior of the cylinder is provided with a plurality of flights 40, and in use the cylinder is preferably inclined downwardly from inlet to outlet end. The front end of the cylinder makes a tight joint with the annular rim 26 and the rear of the cylinder is partly closed by an annular plate 42 having a central circular opening through which extends a cylindrical member 44 which projects inwardly from the casting 14. Secured to the member 44 is a ring 46 provided with a peripheral groove into which, the inner margin of the plate 42 fits, so that rotation and a slight longitudinal movement of the cylinder 32 is permitted andat the same time a practically air-tight joint is obtained through which material being heated cannot pass. A spout 47 for introducing material into the cylinder for treatment therein extends through the member 44. The tubes 10 are held in fixed relative position with the greater portion of them supported from the longer tubes indicated at 16 by means of plates 48 which are provided with holes for the passage of the tubes. These holes are larger than the tubes and are circular so as to rotatably fit into grooves 50 in the peripheries. of rings 52 which have their inner margins conforming to the shape of the angular tubes so that the latter are slidable through the rings. For convenience the rings may be made in three parts secured together by rivets'56, as shown in Fig. 6. This arrangement permits the tubes to be readily screwed into or out of the head 12. The rear ends of the tubes 10 are closed by spinning and welding as indicated at 58 in Fig. 1 so that danger of material sticking to the tubes at this point is eliminated. The threaded front ends of the tubes are rounded,as indicated at 60, and the threads are rolled or cut. The tubes 10 are preferably made of steel which soon acquires a high polish in use so that chance of ma terial sticking thereto is still further reduced. It is possible to make the walls of steel tubing much thinner than is the case with standard black iron pipe and hence a quicker action of the treating agent carried by the tubes is obtained. The tubes 10 are angular and may be square in cross section, as shown in Fig. 1, triangular as shown in Fig. 2 or diamond. shaped as shown in Fig. 3, but in any case are placed in the apparatus with one corner uppermost.

'lhe advantages of my invention will be apparent from the foregoing description. Material to be treated is fed into the cylinder through the spout and as it passes progressively toward the front end of the cylinder, is continually lifted by the'flights 10 and dropped upon the tubes 10. These tubes are preferably arranged in staggered relation in a plurality of rows, as shown in Fig. 5. Since the tubes are placed with a corner uppermost, the material has no chance to lodge on top of the tubes, but it falls in a sinuous path between the tubes, so as to be subjected with a high degree of efficiency to the influence of the heating or cooling agent which is passing through the tubes, and without danger of scorching, injurious chilling or clogging.

I claim: 7

1. Apparatus for drying, heating or cooling material comprising a rotatable cylinder closed at each end, means for feeding material into one end of said cylinder, a plurality of angular tubes having open ends extending through one end of said cylinder and having ends closed by spinning and welding which are located within the other end of said cylinder, said tubes serving to contain a temperature changing agent each of the tubes being arranged with one of its corners uppermost, and flights carried by said cylinder for successively lifting the material and dropping it upon the top of said tubes.

2. Apparatus'for drying, heating or cooling material comprising a rotatable cylinder closed at each end, means for feeding material into one end of said cylinder, a plurality of angular tubes having open ends screwed into threaded openings in one end of said cylinder, plates within said cylinder havin holes through which said tubes extend, said holes being circular and larger than said tubes, members slidably mounted on said tubes and rotatably engaging the material surrounding said holes, said tubes serving to contain a temperature changing agent each of the tubes being arranged with one of its corners uppermost, and flights carried by said cylinder for successively lifting the material and dropping it upon the top or said tubes.

Apparatus for drying, heating or cool ing material comprising a rotatable cylinder closed at each end, means for feeding material into one end of said cylinder, a discharge pipefor the material extending from the other end of said cylinder, an air pipe by means of which air niay be drawn through said cylinder also extending from said lastmentioned end, a plurality of angular tubes in said cylinder, said tubes serving to contain a temperature-changing agent, each tube being arranged with one of its corners uppermost, and flights carried by said cylin der for successively lifting the material and dropping it upon the top of said tubes.

In testimony whereof I hereunto affix my signature.

ALEX G. HUI-IN. 

